LMK04821NKDR

The LMK04821NKDR from Texas Instruments is an active ultra-low jitter synthesizer and jitter cleaner designed for high-performance timing applications. It supports JESD204B standards and offers an ultra-low RMS jitter of 88 fs. The device features 3 input channels and 15 output channels, with output frequencies ranging from 0.045 MHz to 2075 MHz. It supports various output types including LVCMOS, LVDS, and LVPECL, and input types of LVCMOS, LVDS, and LVPECL.

This clock jitter cleaner operates within an industrial temperature range of -40°C to 85°C and requires an operating voltage between 3.15V and 3.45V. The package is a 64-WQFN (9mm x 9mm) with an exposed pad, suitable for surface mounting. The device also supports a PCB temperature of up to 105°C measured at the thermal pad.

Key features include a programmable dual-loop PLLatinum PLL architecture, redundant input clocks with automatic and manual switch-over modes, hitless switching, and an integrated low-noise crystal oscillator circuit with holdover mode. It also offers up to 14 differential device clocks from PLL2 and up to 7 SYSREF clocks, with a maximum clock output frequency of 3.1 GHz.